JPH0585639B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an ion-exchange membrane electrolytic cell which is divided into an anode chamber and a cathode chamber by a bag-like molded body made of a cation exchange membrane. The present invention relates to an improved structure for fixing an upper end opening.

As a method for obtaining caustic soda and chlorine by electrolyzing common salt, an ion exchange membrane electrolysis method has been developed that can produce highly pure caustic soda in place of the conventional mercury electrolysis method and asbestos electrolysis method. . The present applicant filed an invention in November 1982 concerning an electrolytic cell with a structure suitable for modifying a conventionally used asbestos method electrolytic cell to create an ion exchange membrane method electrolytic cell partitioned by a cation exchange membrane. month 24
A patent application was filed on the date. 1 and 2 show one embodiment of the invention, FIG. 1 being a longitudinal sectional view thereof, and FIG. 2 being a partially cutaway perspective view of the upper part of the electrolytic cell.

A is a conductive rod C erected on the bottom plate B of the electrolytic cell.
A bag-shaped molded body consisting of a cation exchange membrane housing one or more anodes D connected to the electrolytic cell body, and one tubular cathode E is located between adjacent bag-shaped molded bodies A inside the electrolytic cell main body. extending from one interior side wall to an opposing interior wall. At the top of the electrolytic cell, there is a bag-shaped molded body A.
Partition plate F having an opening corresponding to the upper end opening of
is installed, and the upper end opening of the bag-like molded body A comes into contact with the opening of the partition plate F, and the bag-like molded body A is fixed by the elastic sheet G and the downward U-shaped lid H. A rectangular cylindrical lid fixing tool I is installed between the upper surfaces of the plurality of lids H, and is fixed to each lid H by a clamp bolt J and a nut K, and presses the lid H downward. The contact portion of the bag-shaped molded body A is sealed to prevent liquid leakage from the anode chamber and the cathode chamber.

However, in an electrolytic cell with this structure, since the frame portion L between the adjacent openings of the partition plate F is not supported, the lid H is bent by strongly pressing downward, resulting in a decrease in the surface pressure of the sealing portion. , there is a risk of liquid leakage due to uneven surface pressure, and since the lid fixing tool I is pressed downward by the clamp bolt J and nut K, the lid fixing tool I will also be deflected. It has the disadvantage of being easy.

The present invention relates to an improvement of the above-mentioned electrolytic cell, and by supporting the partition plate while pulling it upward, the deflection of the partition plate and the lid fixing device is reduced, and liquid leakage from the anode chamber and the cathode chamber is prevented. This invention relates to an electrolytic cell that reliably prevents this.

That is, the present invention provides a plurality of cathodes installed between inner walls of a box-shaped electrolytic cell main body and opposing inner walls, a plurality of cathodes electrically connected to a plurality of conductive rods erected on the bottom plate of the electrolytic cell main body, and multiple anodes disposed between;
and an electrolytic cell in which at least the portion facing the anode and the cathode is formed of a cation exchange membrane, and the electrolytic cell is divided into an anode chamber and a cathode chamber by a bag-shaped molded body containing one or more of the anodes, the electrolytic cell A partition plate having an opening at the upper end thereof at a portion corresponding to the opening at the upper end of the bag-like molded body, and a lid body that individually covers the opening of the bag-like molded body, are arranged so as to correspond to the openings of the partition plate. They are installed so that the upper end of the bag-shaped molded body is closely held between the outer periphery of the lid, and are installed above the partition plate and the lid at a distance, and are approximately perpendicular to the longitudinal direction of the lid. A lid fixing device extending in the direction and a frame portion between adjacent openings of the partition plate are connected by a connecting member, and a positional relationship between the lid fixing device and the frame portion is fixed. This is an exchange membrane method electrolyzer.

Hereinafter, the present invention will be explained in more detail based on the embodiments shown in FIGS. 3 and 4.

FIG. 3 is a longitudinal sectional view showing a first embodiment of the ion exchange membrane method electrolytic cell according to the present invention.

Inside the electrolytic cell body 1, a plurality of porous and hollow tubular cathodes 2 extend from one inner side wall of the electrolytic cell body 1 to an opposite inner side wall. The electrolytic cell bottom plate 3 is formed by providing a corrosion-resistant sheet 5 on a power supply plate 4, and has a plurality of holes 7 at intermediate positions between two adjacent cathodes 2 through which conductive rods 6 can pass. The conductive rod 6 extends into the electrolytic cell body 1 by passing through the hole 7 in the electrolytic cell bottom plate 3, and has a flange 8 at the bottom.
By tightening the nut 9, the flange portion is fixed to the electrolytic cell bottom plate 3.
A porous anode 10 is connected to the upper part of the conductive rod 6,
It is supported vertically so as to face the cathodes 2, and is placed between two adjacent cathodes 2.

The molded body 11, in which at least the portion facing the anode and the cathode is formed of a cation exchange membrane, is bag-shaped and open at the top so as to accommodate one or more anodes 10. The bag-shaped molded body 11 has a hole in its bottom portion corresponding to the hole 7 of the bottom plate 3 of the electrolytic cell through which the conductive rod 6 can pass. The bag-like molded body 11 accommodates the anode 10 therein in close contact with the portion of the molded body 11 formed of the cation exchange membrane, and the conductive rod 6 passes through the hole at the bottom of the molded body 11 to conduct electricity. The molded body 11 is sealed by the flange 8 of the rod, and the molded body 11 is fixed to the bottom plate 3 of the electrolytic cell together with the conductive rod 6 at the flange portion. In this way, the anode chamber 12 is formed inside the bag-shaped molded body 11.

A partition plate 14 is attached to the upper part of the electrolytic cell body 1, and the partition plate 14 is provided with an opening 13 having a tapered surface in a portion corresponding to the upper opening of the bag-shaped molded body 11. A sheet 15 made of an elastic material such as rubber is interposed between the upper end opening of the sheet 11 and the upper end opening. At the top of each anode chamber 12, a lid 16 is provided that contacts the inner edge of the opening of the bag-shaped molded body 11 and has a downward trapezoidal cross section. A sheet 17 made of an elastic material such as rubber is interposed between the molded body 11 and the molded body 11 and serves as a packing material.

A cylindrical spacer 19 is placed on the top surface of the lid 16 via an insulating plate 18, and between the top surfaces of the plurality of spacers 19 is a square cylindrical lid with circular holes 20 bored at equal intervals. A body fixture 21 is installed.
The lower end of a connecting member 23 such as a clamp bolt is screwed into the frame portion 22 between adjacent openings 13 of the partition plate 14, and the connecting member 23 is connected to the lid through a pair of upper and lower sleeves 24. It is fitted into the upper and lower circular holes 20 of the fixture 21. In this case, it is more preferable to screw two or more connecting members 23 into one frame part in order to prevent bending. A spring 26 is interposed between a spring receiver 25 near the upper end of the connecting member 23 and the upper sleeve 24, and the spring receiver 25 is pressed downward with a nut 27 to secure the lid fixing member 21 to the electrolytic cell. It is fixed at the top.

As a modification of this embodiment, the insulating plate 18, spacer 19, spring receiver 25, and spring 26 may be removed, and a spring may be installed in place of the removed spacer.

FIG. 4 is a longitudinal cross-sectional view showing a second embodiment of the ion-exchange membrane electrolytic cell according to the present invention, and the same members as in the first embodiment are given the same reference numerals and their explanations will be omitted.

The upper end opening of the bag-shaped molded body 11 has a sheet 15'
an inner edge of the opening 13' of the partition plate 14' covered with
Each lid 16 is tightly sandwiched between the downwardly tapered portions of the lid 16' provided at the top of each anode chamber 12.
A rectangular cylindrical lid fixture 21' having circular holes 20' drilled at equal intervals is installed between the upper surfaces of the lids 6'. Frame portion 2 between adjacent openings 13' of partition plate 14'
The lower end of a connecting member 23' such as a clamp bolt is screwed into 2', and the connecting member 23' is fitted into the upper and lower circular holes 20' of the lid fixture 21', and
It is fixed to the lid fixture 21' by a nut 27'.

The present invention partitions an anode chamber and a cathode chamber with a bag-like molded body made of a cation exchange membrane, and also tightly clamps the upper end of the bag-like molded body between a partition plate and a lid body, and a frame part of the partition plate and a lid body. Since the fixtures are connected using connecting members, the frame portion of the partition plate, which tends to bend, is supported by one or more connecting members,
No deflection occurs in the frame. As a result, the bag-shaped molded body and the lid body are tightly sandwiched between the lid body and the partition plate with or without the sealing material,
Alternatively, it is possible to reliably prevent liquid leakage from the anode chamber or the cathode chamber due to a decrease in the contact pressure between the bag-shaped molded body and the partition plate, or due to uneven contact. Further, since the frame portion of the partition plate and the lid fixture are connected, and the partition plate does not bend, the lid fixture also does not bend, and the durability of each member is improved.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view showing an example of a conventional ion exchange membrane method electrolytic cell, FIG. 2 is a partially cutaway perspective view of the upper part of the electrolytic cell, and FIG. 3 is an ion exchange membrane method electrolytic cell according to the present invention. A vertical cross-sectional view showing a first example of an electrolytic cell,
FIG. 4 is a longitudinal sectional view similarly showing the second embodiment. 1... Electrolytic cell body, 2... Cathode, 10... Anode, 11... Bag-shaped molded body, 12... Anode chamber, 1
4, 14'... Partition plate, 16, 16'... Lid body, 2
1, 21'... Lid fixture, 22, 22'... Frame portion, 23, 23... Connecting member.

Claims (1)

[Claims] 1. A plurality of cathodes installed between inner walls of a box-shaped electrolytic cell main body and opposing inner walls, electrically connected to a plurality of conductive rods erected on the bottom plate of the electrolytic cell main body, and A plurality of anodes arranged between the cathodes, and at least a portion facing the anodes and the cathode are formed of a cation exchange membrane, and a bag-shaped molded body containing one or more of the anodes is used as an anode chamber and a cathode. In an electrolytic cell divided into chambers, a partition plate is provided at the top of the electrolytic cell, each having an opening at a portion corresponding to the opening at the upper end of the bag-like molded body, and a partition plate that separates the openings of the bag-like molded body individually. A covering lid body is installed so that the upper end of the bag-shaped molded body is closely held between the opening of the partition plate and the outer periphery of the lid body, and is installed at a distance above the partition plate and the lid body. A connecting member connects a lid fixture extending in a direction substantially perpendicular to the longitudinal direction of the lid body and a frame portion between adjacent openings of the partition plate, and the lid fixture and the frame portion are connected to each other by a connecting member. An ion exchange membrane method electrolytic cell characterized by having a fixed positional relationship with. 2. The ion exchange membrane method electrolytic cell according to claim 1, wherein a spacer is interposed between the lid fixture and the lid. 3. The ion exchange membrane method electrolytic cell according to claim 1, wherein the lid fixture and the lid are brought into close contact with each other.